2024-01-18 07:33 |
Isospin-breaking corrections to weak decays: the current status and a new infrared improvement
/ Di Carlo, Matteo
We provide an overview of the current state of lattice calculations concerning isospin-breaking corrections in weak decays, focusing in particular on leptonic decays of light pseudoscalar mesons. We examine the two currently existing calculations, placing a particular emphasis on the role of electromagnetic finite-volume corrections. [...]
arXiv:2401.07666; CERN-TH-2024-005.-
2024-01-23 - 18 p.
- Published in : PoS: LATTICE2023 (2024) , pp. 120
Fulltext: 2401.07666 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.120
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2024-01-17 04:28 |
Brickwall in Rotating BTZ: A Dip-Ramp-Plateau Story
/ Das, Suman (HBNI, Mumbai) ; Kundu, Arnab (HBNI, Mumbai ; CERN)
In this article, building on our recent investigations and motivated by the fuzzball-paradigm, we explore normal modes of a probe massless scalar field in the rotating BTZ-geometry in an asymptotically AdS spacetime and correspondingly obtain the Spectral Form Factor (SFF) of the scalar field. In particular, we analyze the SFF obtained from the single-particle partition function. [...]
arXiv:2310.06438; CERN-TH-2023-187.-
2024-02-08 - 33 p.
- Published in : JHEP 2402 (2024) 049
Fulltext: 2310.06438 - PDF; document - PDF;
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2023-12-26 04:22 |
Extrapolating semileptonic form factors using Bayesian-inference fits regulated by unitarity and analyticity
/ Flynn, Jonathan ; Juettner, Andreas (CERN ; Southampton U.) ; Tsang, Tobias (CERN)
We discuss our recently proposed model-independent framework for fitting hadronic form-factor data, which are often only available at discrete kinematical points, using parameterisations based on unitarity and analyticity. The accompanying dispersive bound on the form factors (unitarity constraint) is used to regulate the ill-posed fitting problem and allow model-independent predictions over the entire physical range. [...]
arXiv:2312.14631; CERN-TH-2023-248.-
2023-12-27 - 7 p.
- Published in : PoS LATTICE2023 (2024) 239
Fulltext: 2312.14631 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.239
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2023-12-23 04:13 |
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2023-12-13 05:10 |
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2023-12-07 04:28 |
Probing Supermassive Black Hole Seed Scenarios with Gravitational-wave Measurements
/ Ellis, John ; Fairbairn, Malcolm ; Urrutia, Juan ; Vaskonen, Ville
The process whereby the supermassive black holes populating the centers of galaxies have been assembled remains to be established, with the relative importance of seeds provided by collapsed Population-III stars, black holes formed in nuclear star clusters via repeated mergers, or direct collapses of protogalactic disks yet to be determined. In this paper we study the prospects for casting light on this issue by future measurements of gravitational waves emitted during the inspirals and mergers of pairs of intermediate-mass black holes, discussing in particular the roles of prospective measurements by LISA and the proposed atom interferometers AION and AEDGE. [...]
arXiv:2312.02983; KCL-PH-TH/2023-69; CERN-TH-2023-227.-
2024-03-11 - 7 p.
- Published in : Astrophys. J. 964 (2024) 11
Fulltext: document - PDF; 2312.02983 - PDF;
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2023-11-28 08:42 |
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2023-11-10 05:03 |
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2023-11-02 04:11 |
The first-order factorizable contributions to the three-loop massive operator matrix elements $A_{Qg}^{(3)}$ and $\Delta A_{Qg}^{(3)}$
/ Ablinger, J. (Linz U. ; OAW, Linz, RICAM) ; Behring, A. (CERN ; DESY, Zeuthen) ; Blümlein, J. (DESY, Zeuthen) ; De Freitas, A. (Linz U. ; DESY, Zeuthen) ; von Manteuffel, A. (Regensburg U. ; Michigan State U.) ; Schneider, C. (Linz U.) ; Schönwald, K. (Zurich U.)
The unpolarized and polarized massive operator matrix elements $A_{Qg}^{(3)}$ and $\Delta A_{Qg}^{(3)}$ contain first-order factorizable and non-first-order factorizable contributions in the determining difference or differential equations of their master integrals. We compute their first-order factorizable contributions in the single heavy mass case for all contributing Feynman diagrams. [...]
arXiv:2311.00644; DO-TH 23/12; DESY 23-142; CERN-TH-2023-164; MSUHEP-23-025; RISC Report series 23-12; ZU-TH 60/23.-
2024-01-10 - 58 p.
- Published in : Nucl. Phys. B 999 (2024) 116427
Fulltext: 2311.00644 - PDF; Publication - PDF;
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2023-11-02 04:07 |
Annihilation of electroweak dumbbells
/ Patel, Teerthal (Arizona State U.) ; Vachaspati, Tanmay (Arizona State U. ; CERN)
We study the annihilation of electroweak dumbbells and the dependence of their dynamics on initial dumbbell length and twist. Untwisted dumbbells decay rapidly while maximally twisted dumbbells collapse to form a compact sphaleron-like object, before decaying into radiation. [...]
arXiv:2311.00026; CERN-TH-2023-200.-
2024-02-22 - 16 p.
- Published in : JHEP 2402 (2024) 164
Fulltext: 2311.00026 - PDF; document - PDF;
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